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<title>Use Case 3 - Update TraffoSim</title>
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<p><strong><font face="Arial">Use Case 3 </font></strong></p>
<p><font face="Arial"><strong>Primary Actor:</strong> Installer, Simulation 
Operator </font></p>
<p><font face="Arial"><strong>Preconditions:</strong> TraffoSim installed successfully, 
the running computer has an Internet connection    
     </font></p>
<p><font face="Arial"><strong>Postconditions:</strong> TraffoSim is successfully 
updated. </font></p>
<p><font face="Arial"><strong>Basic 
Flow:</strong>&nbsp;<br>  
1. 
Installer/Simulation Operation clicks on "Check For Updates" in the TraffoSim 
program.<br>2. New updates have been found and a 
description of the updates are displayed. <br>    3. TraffoSim 
asks the Installer/Simulation Operation for confirmation to install the 
updates. </font><font face="Arial"> <br>4. 
The Installer/Simulation Operator agrees to the updates. <br>    5. TraffoSim installs the updates<br>6. TraffoSim states 
that the updates have been successfully installed. </font></p>
<p><font face="Arial"><strong>Alternative Flows:</strong>&nbsp;&nbsp;<br>*. At anytime, the Installer/Simulation Operator can cancel 
the updates.<br>2a. No updates are available.<br>   
  &nbsp;&nbsp;&nbsp;1. TraffoSim notifies the user that there are no updates.<br>
  &nbsp;&nbsp;&nbsp;2. User clicks ok and is returned to Traffosim program.<br>3a. The 
Installer/Simulation Operator does not confirm to install the 
updates.<br>&nbsp;&nbsp; 1. TraffoSim stops the update     process.<br></font></p>
<p><font face="Arial"><strong>Special Requirements:</strong>&nbsp; </font></p>
<p><font face="Arial"><strong>Frequency of Occurrence:</strong>&nbsp; May be often, 
depending on how often updates are available. </font></p>
<p><font face="Arial"><strong>Open Issues:</strong>&nbsp;&nbsp;Will there be an update 
feature in the final 
version of TraffoSim?&nbsp; 
</font></p>

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